Compact front panel mounting alarm indicating unit FR 6 USB PSC

programmable, for 6 signals

Type designation:

acknowledgeable new alert flashing alarm
with 2 flashing frequencies in accordance
with ISA-18.1/DIN 19235,
and data retention in the absence of power,
for 6 signal inputs

Text -Fallklappenrelais engl

Controls and displays

  • Bright 5mm LED display
  • Separate status indicator (green = power ON)
  • Easily exchangeable label strips
  • Integrated functional buttons


  • UCan be parameterized via the rear mirco USB interface
  • Acknowledgeable new alert/first alert flash warning with 1 or 2 flash rates 
    all sequences ISA-18.1-1979 (R2004) and DIN 19235
  • Quiescent / operating current – for each signal
  • Inputs freely assignable to outputs for each signal
  • Response delay variable for each signal, 50ms to 10min

Electrical characteristics

  • 6 signal inputs 2-pole, max. 230V AC / 220V DC with filter switching and electrical isolation
  • Resolution and switching precision ≥ 1ms
  • EMC-values: Higher immunity levels to UNITRO-EVC-Standard
  • Potential-free outputs: relay change-over max. 5A 250V AC, 3A 30V DC (resolution ≥10ms)
  • Group signal outputs: relay change-over max. 5A 250V AC, 3A 30V DC
  • States saved to memory on power failure

Mechanical characteristics

  • Compact plastic junction housing in accordance with IEC 61554 (96 x 96 x 120 + 25mm)
  • Connection: Screw-type terminals, plug connection max. 2,5mm²


  • Horn output with buzzer: relay change-over max. 5A 250V AC, 3A 30V DC 

Connection diagram (PSC-version)

Technical data:

  • Type of construction:
    control board housing plastic

    96 x 96 x 120 + 25mm
    (cutting for installation: 92 x 92 + 1mm)

  • Degree of protection:
    front IP50 (option IP54), rear IP20

  • Weight:
    approx. 450g

  • Climatically conditions:
    in accordance with UNITRO-PSC-Standard

  • Connection:
    screw-type terminals/ plug connection max. 2,5mm²

  • Supply voltage:
    24V AC/DC to 230V AC/DC


  • Alarm signal nominal voltage:
    24V AC to 230V AC

    24V DC to 220V DC
    voltage tolerance ±15%

  • Input level for signal inputs:
    24V AC/DC ± 10% - 15% 1,7mA

    60V DC ± 10% - 15% 2mA
    110V DC ± 10% - 15% 1,4mA
    220V DC ± 10% - 15% 1,1mA
    230V AC ± 10% - 15% 1,2mA

  • Data retention in the absence of power:
    in EEPROM

subject to change